System.Runtime.Remoting.Messaging.TransitionCall.SyncProcessMessage C# (CSharp) Method

        public IMessage SyncProcessMessage(IMessage msg)
        {
            BCLDebug.Assert(
                Thread.CurrentContext.InternalContextID == _targetCtxID,
                "Transition message routed to wrong context");

            try
            {
                LogicalCallContext oldcctx = Message.PropagateCallContextFromMessageToThread(msg);
                if (_delegate != null)
                {
                    _delegate();            
                }
                else
                {
                    // This is the cross appdomain case, so we need to construct
                    //   the delegate and call on it.
                    CallBackHelper cb = new CallBackHelper(
                                            _eeData,
                                            true /*fromEE*/,
                                            _targetDomainID); 
                    CrossContextDelegate ctxDel = new CrossContextDelegate(cb.Func);
                    ctxDel(); 
                }
                Message.PropagateCallContextFromThreadToMessage(msg, oldcctx);
            }

            catch (Exception e)
            {
                ReturnMessage retMsg = new ReturnMessage(e, new ErrorMessage());
                retMsg.SetLogicalCallContext(
                    (LogicalCallContext) msg.Properties[Message.CallContextKey]);
                return retMsg;
            }

            return this;    
        }